盘中股价异动最大的股票：宝洁、拉姆研究、黑石、西南航空等

1. 核心事实剥离

原新闻仅称盘中异动股包括宝洁、拉姆研究、达美乐? Wait original says Blackstone, Southwest etc. Need accurately mention Procter & Gamble, Lam Research, Blackstone, Southwest, no direction/magnitude. Event essence: reported midday movers, but absent catalysts and move directions, cannot establish tradable fact